Psychrometric Test Chamber

Psychrometric Test Chamber

Berkeley Lab's Psychrometric Test Chamber

The Psychrometric Test Chamber's primary purpose is to evaluate the performance of central air conditioners and heat pumps with cooling capacity in range of 6,000 to 90,000 Btu/h (0.5 to 7.5 rated tons), and with heating capacity in range of 6,000 to 60,000 (0.5 to 5 ton rated). It consists of side-by-side indoor and outdoor chambers with temperature, humidity and air flow controlled independently.

The Test Chamber is designed to maintain a single set of operating conditions and is able to maintain conditions within the following dry bulb and web bulb temperature ranges:

Indoor = 45°F to 100°F DB; 43°F to 85°F WB
Outdoor = -20°F to 120°F DB; 35°F to 90.5°F WB.


U.S. Department of Energy Appliance and Commercial Equipment Standards Program


Tom Burke

Important Links

Energy Efficiency Standards Group: